Soroush

Since Camel 3.0

Both producer and consumer are supported

The Soroush component provides access to the Soroush Bot API. It allows a Camel-based application to send and receive messages by acting as a Bot, i.e. participating in direct conversation with normal users and send and receive message and files

A Soroush Bot must be created before using this component, following the instruction at the Soroush Bot Developers home. when a new Bot is created, the MrBot provides an authorization token corresponding to the Bot. The authorization token is a mandatory parameter for camel-soroush endpoint.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-soroush</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

Soroush Component supports 4 types of endpoint that can be specified in uri path:

Type Description

getMessage (Consumer)

With this endpoint you can receive messages from users.

sendMessage (Producer)

By sending exchange to this endpoint, you can send messages to users.

downloadFile (Producer)

By sending a message to this endpoint the component tries to download message attachments (file & thumbnail) if exists, and store them in SoroushMessage.file and SoroushMessage.thumbnail.

uploadFile (Producer)

By sending a message to this endpoint it will upload file and thumbnail attachments if provided in the message (SoroushMessage.file, SoroushMessage.thumbnail) and store the urls in the message (SoroushMessage.fileUrl, SoroushMessage.thumbnailUrl).

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.

Configuring Endpoint Options

Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL as a type safe way of configuring endpoints.

A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.

The following two sections lists all the options, firstly for the component followed by the endpoint.

Component Options

The Soroush component supports 4 options, which are listed below.

Name Description Default Type

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

boolean

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

boolean

authorizationToken (global)

The default Soroush authorization token to be used when the information is not provided in the endpoints.

String

Endpoint Options

The Soroush endpoint is configured using URI syntax:

soroush:action

with the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

action (common)

Required The action to do.

Enum values:

  • sendMessage

  • getMessage

  • uploadFile

  • downloadFile

SoroushAction

Query Parameters (20 parameters)

Name Description Default Type

connectionTimeout (common)

Connection timeout in ms when connecting to soroush API.

int

maxConnectionRetry (common)

Maximum connection retry when fail to connect to soroush API, if the quota is reached, MaximumConnectionRetryReachedException is thrown for that message.

int

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

boolean

concurrentConsumers (consumer)

Number of Thread created by consumer in the route. if you use this method for parallelism, it is guaranteed that messages from same user always execute in the same thread and therefore messages from the same user are processed sequentially. Default value notice: using SoroushBotSingleThreadConsumer.

int

queueCapacityPerThread (consumer)

Maximum capacity of each queue when concurrentConsumers is greater than 1. if a queue become full, every message that should go to that queue will be dropped. If bridgeErrorHandler is set to true, an exchange with CongestionException is directed to ErrorHandler. You can then processed the error using onException(CongestionException.class) route. Default value notice: infinite capacity.

int

exceptionHandler (consumer (advanced))

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer (advanced))

Sets the exchange pattern when the consumer creates an exchange.

Enum values:

  • InOnly

  • InOut

  • InOptionalOut

ExchangePattern

autoDownload (producer)

Automatically download SoroushMessage.fileUrl and SoroushMessage.thumbnailUrl if exists for the message and store them in SoroushMessage.file and SoroushMessage.thumbnail field.

boolean

autoUploadFile (producer)

Automatically upload attachments when a message goes to the sendMessage endpoint and the SoroushMessage.file (SoroushMessage.thumbnail) has been set and SoroushMessage.fileUrl(SoroushMessage.thumbnailUrl) is null.

boolean

downloadThumbnail (producer)

If true, when downloading an attached file, thumbnail will be downloaded if provided in the message. Otherwise, only the file will be downloaded.

boolean

forceDownload (producer)

Force to download SoroushMessage.fileUrl(SoroushMessage.thumbnailUrl) if exists, even if the SoroushMessage.file(SoroushMessage.thumbnail) was not null in that message.

boolean

forceUpload (producer)

Force to upload SoroushMessage.file(SoroushMessage.thumbnail) if exists, even if the SoroushMessage.fileUrl(SoroushMessage.thumbnailUrl) is not null in the message.

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

boolean

backOffStrategy (scheduling)

The strategy to backoff in case of connection failure. Currently 3 strategies are supported: 1. Exponential (default): It multiply retryWaitingTime by retryExponentialCoefficient after each connection failure. 2. Linear: It increase retryWaitingTime by retryLinearIncrement after each connection failure. 3. Fixed: Always use retryWaitingTime as the time between retries.

String

maxRetryWaitingTime (scheduling)

Maximum amount of time (in millisecond) a thread wait before retrying failed request.

long

reconnectIdleConnectionTimeout (scheduling)

The timeout in millisecond to reconnect the existing getMessage connection to ensure that the connection is always live and does not dead without notifying the bot. this value should not be changed.

long

retryExponentialCoefficient (scheduling)

Coefficient to compute back off time when using Exponential Back Off strategy.

long

retryLinearIncrement (scheduling)

The amount of time (in millisecond) which adds to waiting time when using Linear back off strategy.

long

retryWaitingTime (scheduling)

Waiting time before retry failed request (Millisecond). If backOffStrategy is not Fixed this is the based value for computing back off waiting time. the first retry is always happen immediately after failure and retryWaitingTime do not apply to the first retry.

long

authorizationToken (security)

The authorization token for using the bot. if uri path does not contain authorization token, this token will be used.

String

Usage

Every exchange that you send to soroush endpoint must contain a body of type org.apache.camel.component.soroushbot.models.MessageModel. Similarly, every exchange you receive from soroush endpoint contains a body of MessageModel too.

SoroushMessage message = exchange.getIn().getBody(SoroushMessage.class)

Receive Message

With this endpoint you can receive messages from users.

The following is a basic example of how to receive all messages that your Soroush users are sending to the configured Bot. In Java DSL:

from("soroush:getMessage/YourAuthorizationToken?autoDownload=true")
    .bean(ProcessorBean.class);

and in Spring XML

<route>
    <from uri="soroush:getMessage/YourAuthorizationToken?autoDownload=true"/>
    <bean ref="processorBean" />
<route>

<bean id="processorBean" class="com.example.ProcessorBean"/>

Download File

This endpoint is useful when you want to conditionally download the files specified in the message. When you send a message to this endpoint it opens a connection to Soroush Server for downloading the files and store InputStream of that connection in SoroushMessage.file and SoroushMessage.thumbnail and then you can read contents of the files.

If you delay reading from these streams, the Soroush server may close the connection. You are responsible for storing attachment files on your disc if needed.

Please refer to Query Parameters table for more information.

The following is an example of how to conditionally download files in the messages.

from("soroush:getMessage/YourAuthorizationToken")
    .choice().when(exchange -> {
        SoroushMessage soroushMessage = exchange.getIn().getBody(SoroushMessage.class);
        return soroushMessage.getFileSize()!=null && soroushMessage.getFileSize()<10000;
                               })
    .to("soroush:downloadFile/YourAuthorizationToken");
    .otherwise().stop()
    .end()
    .bean(ProcessorBean.class)

Send Message

This endpoint is your primary way to send messages and upload files. You can simply send a message to a user by sending the message to this endpoint.

This is a simple example that simply replies every user messages with the same message.

from("soroush:getMessage/YourAuthorizationToken")
    .process(exchange->{
        SoroushMessage soroushMessage = exchange.getIn().getBody(SoroushMessage.class);
        soroushMessage.setTo(soroushMessage.getFrom());
    })
    .to("soroush:sendMessage/YourAuthorizationToken");

Auto Upload Attachments

This endpoint can help you to automatically upload files and thumbnails of a message to the server and set fileUrl and thumbnailUrl of that message to proper values taken from Soroush Upload File Api. The only thing you need to do is setting SoroushMessage.file and SoroushMessage.thumbnail properties. There are 4 utility methods provided for this purpose:

SoroushMessage.setFile(File file)
SoroushMessage.setFile(InputStream fileStream)
SoroushMessage.setThumbnail(File thumbnail)
SoroushMessage.setThumbnail(InputStream thumbnailStream)

Upload File

This endpoint is a utility endpoint that allows you to upload a file without sending the message. The only thing you need to do for uploading a file is to set SoroushMessage.file and Send Message.thumbnail and this endpoint upload them to the Soroush server.

from("soroush:getMessage/YourAuthorizationToken")
    .process(exchage->{
        SoroushMessage response = new SoroushMessage();
        response.setTo(exchange.getIn().getBody(SoroushMessage.class).getFrom());
        response.setFile(new File("MyResponse.jpg"))
    })
    .to("soroush:uploadFile/YourAuthorizationToken")
    .process(exchage->System.out.println(exchange.getIn().getBody(SoroushMessage.class).getFileUrl())

Error Handling

There are 3 types of exceptions that can be produced in Soroush Component.

Exception Description

CongestionException

this exception occurs when bridgeErrorHandler=true and you use more than 1 concurrentConsumer (concurrentConsumers>1) and queueCapacityPerThread is reached for a queue, on any message that goes to that queue, a CongestionException will throw.

MaximumConnectionRetryReachedException

when the component could not connect to the Soroush server for more than MaxConnectionRetry times

SoroushException

when a request is rejected by Soroush Server.

One way to handle these exceptions is by using onException route definition:

onException(CongestionException.class).log("Failed to processing ${id}")

Spring Boot Auto-Configuration

When using soroush with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-soroush-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 5 options, which are listed below.

Name Description Default Type

camel.component.soroush.authorization-token

The default Soroush authorization token to be used when the information is not provided in the endpoints.

String

camel.component.soroush.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.soroush.bridge-error-handler

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

Boolean

camel.component.soroush.enabled

Whether to enable auto configuration of the soroush component. This is enabled by default.

Boolean

camel.component.soroush.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean